| Significance | Code | Meaning |
|---|
| FIR | EGTT | London FIR | | | / | | | Qualifiers | Q | | | | OB | Obstacle | | | CE | erected | | | / | | | Traffic | I | IFR traffic affected | | | V | VFR traffic affected | | | / | | | Purpose | M | Miscellaneous | | | / | | | Scope | E | En-Route information | | | / | | | From flight level | 000 | Surface | | | / | | | Up to flight level | 003 | 300 feet QNE | | | / | | | Centre Latitude | 5126N | 51° 26' North' | | Centre Longitude | 00024W | 0° 24' West | | Radius of area affected | 001 | 1 nautical miles |
| | UNLIT CRANE AT POSITION 512556N 0002341W ( HANWORTH,GREATER LONDON ) IN THAMES VALLEY AVOIDANCE AREA DAY AND NIGHT.HEIGHT 260FT ABOVE MEAN SEA LEVEL ( 190FT ABOVE GROUND LEVEL ). 26 / 05 / 104 / LFC |
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